Improvement in securing drill and cultivator-teeth



THOMAS & MAST. t seed-Drill Tooth. No. 105,387. Patented July 12, 1870.;

" N einem 551mgf @anni @twine j JoHN H. .THOMAS AND PHINEAs P; MAST, or SPRINGFIELD, culo.

Letters Patent No. 105,387, dated July 12, 1870.

IMPROVEMENT IN SCURING' DRILL AND CULTIVATOR-TEETH.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it 'may conccrn Be it known that we, J OHN H. THOMAS and PHIN- EAS P. MAST, of Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Fastening Drill-Teeth; and ive dohereby declare that the following is a full, clear, and exact description thereof', reference heiughad to the accompanying drawing making partv of this specil fication, and to the letters of reference marked thereon, like letters indicating like parts wherever they lsection of the saine taken Y vided at its upper end with a tubular neck, a., which neck has a groove or slot, l), made across its front side, as shown in figs, 1 and 2.

B is the bar or frame to which the tooth is secured,

this bar having a vertical hole made through it, into which the neck a of the tooth isfinserted.

Through the frame A, I make a horizontal hole,

which, when the neck a is inserted, comes inline with vits slot, b, and, after inserting the neck, drive a pin, C, into the hole, as shown in figsl and 2. p

The pin, tluis'inserted, passes through the slot in the neck, and thus fastens the tooth securely tothe frame, so that it cannot tip, turn, or pull out. Strain brought upon the point of the tooth wedges the slot more tightly over the pin, and, consequently, locks the tooth more rigidly in place.

Then desired, a. plate or washer, (l, ina-y be placed on the neck a, so as to rest against the under side of' the frame, and prevent chang or wearing of' the. wood.

It is obvious that this plan may be used with any and all styles of teeth which have their shank inserted into a hole in the frame.

l-It is also obvious that, instead of a round groove and p1n,as shown, any other shape may be used, if desired, such as square or triangular, or a wedge may be used.

Having thus described our invent-ion,

What -we claim is-' The drill or cultivator-tooth A, having the groove b formedfhi its shank, for the reception oi' a pin, C, to secure it in place, substantially as described.

JOHN H. THOMAS'. PHINEAS P. MAST.

Witnesses:

GEO. ARTHUR, NV. B. LENBiNE. 

